Yes some aesthetic reason, that's it.
It is amazing that it can push all the body fat on a womans body to her breasts. If this works they would be very rich. They would appyling the same scientific approach to male enhancement.

LOL I was speculating, I didn't expect to be right. Those chinese models in the commercials reminds me of venus handless statue so I thought aesthetic..

Guess you just answered your own question and left hook tua would be first in line if ever they go to the next level. Ooopps.